They say just before 1:30 the woman walked into the Stripes on Holliday wearing a blue hooded sweatshirt.
They say she displayed a knife and demanded money.
Police say she took off on foot with about $20.00.
About 10 minutes later, Police believe the same woman attempted to rob a man at an ATM on Midwestern Parkway.
The man called Police and the woman fled in a Honda Pilot.
The vehicle was pulled over and the woman arrested.
She's set to be charged with aggravated robbery.
A second woman in the vehicle was detained but is not facing any charges at this time.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.